Style #4011 These ultra-lightweight liners hold in heat with soft, natural Merino wool. Merino moves moisture away naturally and is itch-free. The reinforced heel and toe add longer sock life and a smooth, flat toe seam adds comfort. * Reinforced toe and heel add durability and longer sock life * Smooth, flat comfort toe seam * 65% Merino wool, 34% nylon, 1% spandex